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| author | Matthias Braun <matze@braunis.de> | 2015-06-24 20:03:27 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2015-06-24 20:03:27 +0000 |
| commit | ba3ecc3c804b05e725f46018690b58acb697f3b7 (patch) | |
| tree | 518dcf2413ca74a71366161c75842bc45e6b4e9b /llvm/test/CodeGen/ARM | |
| parent | a681ea25ede8ce8b65cb6dbc1742406bbaf88afb (diff) | |
| download | bcm5719-llvm-ba3ecc3c804b05e725f46018690b58acb697f3b7.tar.gz bcm5719-llvm-ba3ecc3c804b05e725f46018690b58acb697f3b7.zip | |
ARMLoadStoreOptimizer: Fix errata 602117 handling and make testcase actually test for it
This fixes PR23912
Differential Revision: http://reviews.llvm.org/D10620
llvm-svn: 240582
Diffstat (limited to 'llvm/test/CodeGen/ARM')
| -rw-r--r-- | llvm/test/CodeGen/ARM/ldrd.ll | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/llvm/test/CodeGen/ARM/ldrd.ll b/llvm/test/CodeGen/ARM/ldrd.ll index a8070ea68aa..f3e13671ac3 100644 --- a/llvm/test/CodeGen/ARM/ldrd.ll +++ b/llvm/test/CodeGen/ARM/ldrd.ll @@ -6,23 +6,24 @@ ; Magic ARM pair hints works best with linearscan / fast. -; Cortex-M3 errata 602117: LDRD with base in list may result in incorrect base -; register when interrupted or faulted. - @b = external global i64* -define i64 @t(i64 %a) nounwind readonly { -entry: -; A8-LABEL: t: -; A8: ldrd r2, r3, [r2] - -; M3-LABEL: t: -; M3-NOT: ldrd +; We use the following two to force values into specific registers. +declare i64* @get_ptr() +declare void @use_i64(i64 %v) - %0 = load i64*, i64** @b, align 4 - %1 = load i64, i64* %0, align 4 - %2 = mul i64 %1, %a - ret i64 %2 +define void @test_ldrd(i64 %a) nounwind readonly { +; CHECK-LABEL: test_ldrd: +; CHECK: bl{{x?}} _get_ptr +; A8: ldrd r0, r1, [r0] +; Cortex-M3 errata 602117: LDRD with base in list may result in incorrect base +; register when interrupted or faulted. +; M3-NOT: ldrd r[[REGNUM:[0-9]+]], {{r[0-9]+}}, [r[[REGNUM]]] +; CHECK: bl{{x?}} _use_i64 + %ptr = call i64* @get_ptr() + %v = load i64, i64* %ptr, align 8 + call void @use_i64(i64 %v) + ret void } ; rdar://10435045 mixed LDRi8/LDRi12 |
